I had Pierogi Casserole for dinner last night and probably for lunch today.
It is totally a large pan of Pierogi and very tasty. My wife liked it as well. As you can see below, it is a pretty dish as well.
I do think that next time I will use one stick of better and use some for the onions and some for the pan and the rest in the potatoes. Don't get me wrong, I love butter but it was settled in the pan. Also I did not have any sour cream which would have been excellent.
I used a bit of cracked pepper and garlic powder in the potaotoes and next time I think I am going to use a bigger onion. Maybe my lasagna noodles are different, but a 1 lb. box had 20+ noodles in it and I only used 9 (would have used 12 if I had not run out of potato).
Any way, it is really good eating and I am no vegetarian. I am a bit excited to make the recipe Linsfin has posted using the bacon and sauerkraut.
One more thing; next time I would cook it at 350 degrees for 30 minutes then uncover and cook for another 10 or 15 minutes to crisp up the top. I know this is not pierogi-like but I prefer crunchy tops.